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Multi-symptom asthma as an indication of disease severity in epidemiology
Krefting Research Centre, Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Krefting Research Centre, Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Krefting Research Centre, Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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2011 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 38, no 4, 825-832 p.Article in journal (Refereed) Published
Abstract [en]

Epidemiological questionnaires have failed to identify individuals with severe asthma. The extent of symptoms of asthma can, however, be easily established in epidemiology, by identification of multiple symptoms. We hypothesise that reporting of multiple symptoms of asthma reflects uncontrolled disease and is a sign of more severe asthma. The aims of the current study were, therefore, to determine the prevalence and determinants of multi-symptom asthma.

A postal questionnaire was sent to 30,000 randomly selected individuals aged 16–75 yrs. A subgroup underwent clinical examinations. Multi-symptom asthma was defined as reported physician-diagnosed asthma, use of asthma medication, recurrent wheeze, attacks of shortness of breath and at least one additional respiratory symptom.

The prevalence of multi-symptom asthma was 2.0%, and it was more common among females (2.4 versus 1.5%; p<0.001) and those with a body mass index >30 kg·m-2. Multi-symptom asthmatics had lower forced expiratory volume in 1 s, higher exhaled nitric oxide fraction and more pronounced hyperresponsiveness. Family history of both asthma and allergy (OR 7.3), and occupational exposure to gas dust or fumes (OR 2.0) were also significant risk factors.

Multi-symptom asthmatics comprise 2% of the general population; multi-symptom asthma is related to signs of more severe disease and could be used as an epidemiological marker of disease severity.

Place, publisher, year, edition, pages
2011. Vol. 38, no 4, 825-832 p.
Keyword [en]
multi-symptom asthma, risk factors, population study, epidemiology
National Category
Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:umu:diva-40450DOI: 10.1183/09031936.00143710PubMedID: 21310882OAI: oai:DiVA.org:umu-40450DiVA: diva2:399698
Available from: 2011-02-23 Created: 2011-02-23 Last updated: 2017-12-11Bibliographically approved

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